Re^2: my within brackets

it's explicitly documented

I had looked at the docs for my and didn't find it very explicit at all. It says "If more than one variable is listed, the list must be placed in parentheses" but makes no reference to having the my statement inside the parenthesis. Or am I missing something subtle in the documentation?

This declaration seems unusual and I don't recall seeing it anywhere else which is why it stood out.

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Re^3: my within brackets by LanX (Saint) on Oct 14, 2021 at 19:42 UTC
this > "If more than one variable is listed, the list must be placed in parentheses" means: If VARLIST is `$x,$y,$z` you must write `my ($x,$y,$z)` The alternative `my $x,$y,$z` would only declare $x because of precedence, like `(my $x),$y,$z` Hence an alternative to what we want is `my $x,my $y,my $z` But since we need a list assignment on the LHS, we still need to put it all into parens `(my $x,my $y,my $z) = split ...` because this `my $x,my $y,my $z = split ...` would only assign to $z because of precedence°, like `(my $x),(my $y),(my $z = split ...)` HTH! :) Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery} Errata `s/declare/assign to/` choroba++ UPDATES °) Even worse, it would only be a scalar assignment to $z, i.e. the number of possible splits.	[reply] [d/l] [select]

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Re^3: my within brackets
by LanX (Saint) on Oct 14, 2021 at 19:42 UTC

> "If more than one variable is listed, the list must be placed in parentheses"

means:

If VARLIST is

$x,$y,$z

you must write

my ($x,$y,$z)

The alternative

my $x,$y,$z

would only declare $x because of precedence, like

(my $x),$y,$z

Hence an alternative to what we want is

my $x,my $y,my $z

But since we need a list assignment on the LHS, we still need to put it all into parens

(my $x,my $y,my $z) = split ...

because this

my $x,my $y,my $z = split ...

would only assign to $z because of precedence°, like

(my $x),(my $y),(my $z = split ...)

HTH! :)

Cheers Rolf
_{(addicted to the Perl Programming Language :)

Wikisyntax for the Monastery}

Errata

s/declare/assign to/ choroba++

UPDATES

°) Even worse, it would only be a scalar assignment to $z, i.e. the number of possible splits.

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